3870505001855 has 32 divisors (see below), whose sum is σ = 4935674953728. Its totient is φ = 2903696294400.

The previous prime is 3870505001813. The next prime is 3870505001873. The reversal of 3870505001855 is 5581005050783.

It is not a de Polignac number, because 3870505001855 - 2⁶ = 3870505001791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32202020 + ... + 32321990.

It is an arithmetic number, because the mean of its divisors is an integer number (154239842304).

Almost surely, 2^{3870505001855} is an apocalyptic number.

3870505001855 is a deficient number, since it is larger than the sum of its proper divisors (1065169951873).

3870505001855 is a wasteful number, since it uses less digits than its factorization.

3870505001855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121367.

The product of its (nonzero) digits is 840000, while the sum is 47.

The spelling of 3870505001855 in words is "three trillion, eight hundred seventy billion, five hundred five million, one thousand, eight hundred fifty-five".